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All LessonsFree Lessons (13)

Introduction to JavaScript

What is JavaScript?How Compilation Works JavaScript Engines Quiz on JavaScript Engineering

Values, Variables and Operators

"Hello World!" in JavaScript Values And Variables Variable Mutation Exercise: Juggling Values Solution Review: Juggling Values Basic Operators Operator Precedence Exercise: Translate Solution Review: Translate Quiz on Introduction to JavaScript

JavaScript Types

Types Definition Types in JavaScript Objects Type Conversion and Coercion Static vs Dynamic Type Checking Exercise: Library Management Solution Review: Library Management Quiz on Types

JavaScript Conditionals

Introduction to Conditionals Conditionals in JavaScript Ternary Operators and Conditionals Exercise: Calculator Solution Review: Calculator Quiz on Conditionals

JavaScript Arrays

Introduction to Arrays Declaring and Mutating Arrays Array Methods and Properties Replication with Array Methods Multi-dimensional Arrays Exercise: Data Extraction Solution Review: Data Extraction Quiz on Arrays

JavaScript Loops

Introduction to Loops Loops in JavaScript While and Do/While Loops For Loops Break and Continue in Loops Iterating Arrays Iterating Objects Exercise: Counting Population Solution Review: Counting Population Quiz on Loops

JavaScript Functions

Introduction to Functions Functions in JavaScript Nested Functions in JavaScript Arrow Functions in JavaScript Function as an Argument Function as the Returned Object Array Methods Map and Reduce Methods Exercise: Creating Boards Solution Review: Creating Boards Quiz on Functions

JavaScript Scope

Scope Introduction

Scope in JavaScript

Exercise: Debugging 101

Solution Review: Debugging 101

Mini Project

Find Mutual Friends

Solution Review

Solution to Sub-task: Setting Up Solution to Sub-task: Map Solution to Sub-task: Group Solution to Sub-task: Reduce Solution to Find Mutual Friends

JavaScript Regular Expression

Regular Expressions Introduction Regular Expressions Syntax Regular Expressions in JavaScript RegExp Objects in JavaScript Regular Expressions and String Methods Exercise: Password Checker Solution Review: Password Checker Quiz on Regular Expression

JavaScript OOP

Introduction to OOP JavaScript Prototypes JavaScript Constructor Functions JavaScript Classes Data Protection in OOPs Inheritance Inheritance in Constructor Functions Inheritance in Classes JavaScript Object Notation Exercise: Modeling Classes Solution Review: Modeling Classes Quiz on OOPs

Mini Project

Maze Solver

Solution Review

Solution to Sub-task: Creating a maze Solution to Sub-task: Creating MazeSolver Solution to Sub-task: Finding Traversable Indices Solution to the Sub-task: Finding Neighboring Traversable Indices Solution to Sub-task: Checking if an index is already visited Solution to Maze Solver

JavaScript Functional Programming Primer

Function Composition Recursion JavaScript Recursion Visualization Exercise: Pascal's Triangle Solution Review: Pascal's Triangle Quiz on Functional Programming

Mini Project

Justify Text

Solution Review

Solution to Sub-task: Split Line Solution to Sub-task Line Breaks Solution to Sub-task: Blank Insertions Solution to Sub-task: Line Cost Solution to Sub-task: best line break Solution to Justify Text

JavaScript Web Development

Introduction to Web Development JavaScript: Window Object JavaScript: BOM JavaScript: DOM Mixing JavaScript with Some HTML Running JavaScript with HTML DOM Manipulation with JavaScript Exercise: Know Your Browser Solution: Know Your Browser Quiz on Web Development

JavaScript Asynchronous Programming

What is Asynchronous?Asynchronicity in JavaScript Callback functions Promises Async/Await Error Handling Events in Web Page Exercise: Check Your Directory Solution: Check Your Directory Quiz on Asynchronous Programming

Mini Project

File Searcher

Solution Review

Solution to Sub-task: Get Path Names Solution to Sub-task: Get Nested Path Name Solution to Sub-task: Read Files Solution to File Searcher

JavaScript Modern Workflow

ECMAScript and JavaScript Transpilation ECMAScript Versions and Features Quiz on Modern Workflow

JavaScript Future Awaits

Career Paths That Await Learning Paths that Await

JavaScript in Detail: From Beginner to Advanced/

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Lexical Scope

Lexical Scope

Overview of lexical scope in JavaScript.

We'll cover the following...

Background
Introduction

Background

There are two types of scopes: global and local. We have yet to explore exactly how local scopes draw boundaries between themselves. Additionally, JavaScript has some features that allow inner scopes to access values from the outer scope.

Introduction

Lexical scope is the ability for a function scope to access variables from ...